African Phoenix is a kind of cichlid bream. Its body length can reach 15 cm, and it is bright yellow when it is young. At the same time, there are two black stripes in the upper part of its body. This kind of fish has a strong sense of territory, so it can only be mixed when it is a child, and it must be raised alone when it is an adult, otherwise it will be extremely aggressive. In addition to attacking the same kind, it will also attack other male fish of the same genus.

Red Cross fish is a small ornamental fish of the family Cyprinidae. It is common and easy to raise, but its temperament is fierce, so it is not suitable for polyculture. Its fins are red and its body length is less than 10 cm. If it is raised artificially, it is necessary to control the ph of the water body between 6-7.2 and keep the water temperature at about 23-28 ℃.

Tiger skin fish is very small, only 4-6 cm in length, mainly light yellow in body color, but with black stripes, and its shape is similar to tiger skin, hence its name. It is a tropical fish that likes high temperature and high oxygen. At the same time, it eats miscellaneous food and likes to eat live food. Because of its fierce temperament, it is rarely mixed with other fish.

Silver screen lamp, also known as silver screen fish, is native to South America, with a body length of 5-7 cm, suitable for moving in the environment between 22-25 ℃, and likes weak acidic soft water. It usually moves in the middle and upper layers of water and does not choose food. Because of its fierce temperament, it often attacks other fish, so it is best to keep it alone.

Listen to the name, Betta is a cruel character, it is not big, but it is extremely fighting. When two male fish are put together, they will definitely fight to the death, so this kind of fish can only be raised alone. Because it is a fish of the family Percidae and has the auxiliary respiratory organ of suprambranchial organ, it can survive in the environment with low dissolved oxygen.